Post-dispersal embryo development, germination phenology, and seed dormancy in Cardiocrinum cordatum var. glehnii (Liliaceae s. str.), a perennial herb of the broadleaved deciduous forest in Japan
Post-dispersal embryo development, germination phenology, and seed dormancy in Cardiocrinum cordatum var. glehnii (Liliaceae s. str.), a perennial herb of the broadleaved deciduous forest in Japan
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DOI：
10.3732/ajb.93.6.849
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发表时间：
2006-06-01
影响因子：
3
通讯作者：
Baskin, CC
中科院分区：
文献类型：
--
作者：
Kondo, T;Sato, C;Baskin, CC
对大百合种子萌发进行了研究。glehnii，10月份新鲜种子中的胚不发达，直到第二年9月才生长。然后，他们迅速增长，并在11月初完全拉长。扩散后的第二个春天，胚根出现在3月下旬的雪下和4月的融雪后。胚根后不久出现子叶。在几个实验室实验中，胚胎在25度/15摄氏度后在15度/5摄氏度（光照12小时/黑暗12小时）下生长。胚根从具有完全伸长的胚的种子在0度-5度C的冷层积后在5度-15度C出现。子叶在15度/5度C至30度/20度C下从具有胚根的种子中在2周内出现。种子需要C。在控制条件下，散布后18-19个月自然萌发，仅需9个月，顺序为25度/15度C 15度/5度C -> 15度-5度C -> 15度/5度C。这是从种子繁殖植物的实用知识。GA（3）处理部分取代了高温处理的要求。基于打破休眠的要求，种子具有深的简单形态生理休眠（MPD）。百合科植物种子休眠研究进展。结果表明，在这种情况下，系统发育位置不是MPD水平的良好预测因子。
In an investigation of seed germination in Cardiocrinum cordatum var. glehnii, embryos in fresh seeds in October were underdeveloped and did not grow until September of the following year. Then, they grew rapidly and had fully elongated by early November. In the second spring after dispersal, radicles emerged under snow in late March and after snowmelt in April. Cotyledons emerged soon after radicles. In several laboratory experiments, embryos grew at 15 degrees/5 degrees C (light 12 h/dark 12 h) following 25 degrees/15 degrees C. Radicles emerged from seeds with fully elongated embryos at 5 degrees-15 degrees C after cold stratification at 0 degrees-5 degrees C. Cotyledons emerged in 2 wk from seeds with a radicle at 15 degrees/5 degrees C to 30 degrees/20 degrees C. Although seeds require c. 18-19 mo after dispersal to germinate in nature, under controlled conditions, they required only 9 mo with a sequence of 25 degrees/15 degrees C 15 degrees/5 degrees C -> 15 degrees-5 degrees C -> 15 degrees/5 degrees C. This is practical knowledge for propagation of plants from seeds. GA(3) treatment partially substituted for the high temperature requirement. Based on dormancy-breaking requirements, the seeds have deep simple morphophysiological dormancy (MPD). A literature review of seed dormancy in taxa of Liliaceae s. str. showed that phylogenetic position in this case is not a good predictor of level of MPD.